Delivery without instructions, information available only on packaging ... In times of Internet no problem, to get them from the manufacturer's site - denkste ;-( Unfortunately only in Dutch, the rest of the site is in German. So if you can Dutch, please: [..] The notes on the Amazon side are better than those on the manufacturing side - so praise to Amazon. The packaging is a secret that the battery is not replaceable !!! The battery should maintain 10 years which I think is good in itself. But that run these 10 years from the date of manufacture and not from the activation is only from the expression shown in the article. Unfortunately, this part of only one year was the supplier.
Whether it actually last as long and that the detector works! In case of fire, I can not judge (because there may not yet occurred - must also not be). Due to the negative aspects (duration of the battery, not replaceable, no German manual) there are only 3 star - It would be easy to make improvements to the effect of manufacturing side.
